When you consider you may well pay £50, £100 or perhaps higher to have your gas boiler service. You could find that you could be actually saving yourself money if you have the service done on a regular basis. The main reason for this benefit, is due to the fact that in your boiler deposits can build up inside the boiler and the central heating system. This can reduce the overall efficiency of the system. This increases the chances of higher gas bills as the boiler works harder. If you have an annual service from a reputable tradesman, they will ensure they include a thorough clean of any dirty parts of any deposits of dirt in the boiler. This service will in turn increase the boiler efficiency  and in turn save money as the boiler will not have to work so hard.